How many user your Zimbra server has?

Hi every body.
I want to try using zimbra server (Open source edition) to my company. But I don't know how many accounts it can serves, so I want you show me how many users your Zimbra server has?
Srr because I can't test the aptitude of zimbra server Open source edition.Can you help me?
Thanks for your help
And if I want to try it with a lot of account ( over 1000 users) I must prepare what: server,network?

Hi every body.
I want to try using zimbra server (Open source edition) to my company. But I don't know how many accounts it can serves, so I want you show me how many users your Zimbra server has?
Srr because I can't test the aptitude of zimbra server Open source edition.Can you help me?
Thanks for your help
And if I want to try it with a lot of account ( over 1000 users) I must prepare what: server,network?

There are several threads in the forums describing how many users Zimbra can support and what the hardware requirements are, did you search first?

I searched, but not thing I need. Because all I want is in the fact, who deployed a larger system with a lager lager amount of accounts. I can't test in my company, my boss doesn't allow me (he want to try but doesn't want to test ( )

thanks for your help, I hope with my server:
xeon 8 cpu
4GB ram
4x146GB
can serves for 800 user
they only use IMAP and smtp service
and I'll use version 6.0.1 FOSS edition
Can it does this?

We have a dual-processor (4 cores on each) Xeon server with 8GB of RAM, and 2x 70GB disks (15k RPM SAS, RAID1). The server has about 1000 accounts, with 100-200 being active every day using the web console. So I would give an esimated guess that your server would easily cope.

Hi, after some tests, I had a good result:
With our server:
2 CPU xeon dual core 2.0GHZ - 32 bit
4GB ram
440 GB HDD RAID-5
ubuntu 8.04.4
We can serve for 634 users (active every work time)who always use IMAP, POP3 and SMTP
about 8000-10000 mails per day
Zimbra 6.0.1 GA FOSS edition
Thanks for zimbra teams and the support of every one

I did an installation for an internet portal with a little over 13000 users. Most have their mail forwarded to another address so they're not actively using ZCS, maybe just the MTA (and LDAP) but it's working quite well with an incredibly small amount of memory and cpu given the user count.